Remove unused symbols CONFIG_SYS_JFFS2_FIRST_BANK et al

This removes the following symbols:
   CONFIG_RTC_MCFRRTC
   CONFIG_SYS_JFFS2_FIRST_BANK
   CONFIG_SYS_JFFS2_FIRST_SECTOR
   CONFIG_SYS_JFFS2_NUM_BANKS
   CONFIG_SYS_LBC_CACHE_BASE
   CONFIG_SYS_LIME_SIZE
   CONFIG_SYS_MAMR
   CONFIG_SYS_MCFRRTC_BASE
   CONFIG_SYS_MONITOR_SEC

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>